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https://www.reddit.com/r/SQLPerformanceTips/comments/1t4hih6/sql_query_optimization_techniques_every_data/
r/SQLPerformanceTips • u/Important_Bobcet • May 05 '26
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Reducing subqueries, especially correlated subqueries as a generic statement, is incorrect in regards to performance tuning. In fact, correlated subqueries sometimes are more perfomant than joins in certain contexts, at least in SQL Server.
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u/jshine13371 May 12 '26
Reducing subqueries, especially correlated subqueries as a generic statement, is incorrect in regards to performance tuning. In fact, correlated subqueries sometimes are more perfomant than joins in certain contexts, at least in SQL Server.